A5041924377- HVDC Systems and Fault Protection
- Power Systems Fault Detection
- Power System Optimization and Stability
- High-Voltage Power Transmission Systems
- Microgrid Control and Optimization
- Power Systems and Renewable Energy
- Islanding Detection in Power Systems
- Wind Turbine Control Systems
- Smart Grid and Power Systems
- Power Systems and Technologies
- Smart Grid Security and Resilience
- Power Transformer Diagnostics and Insulation
- Adaptive Control of Nonlinear Systems
- Power System Reliability and Maintenance
- Machine Fault Diagnosis Techniques
- Advanced Decision-Making Techniques
- Magnetic Properties and Applications
- Advanced Algorithms and Applications
- Frequency Control in Power Systems
- Advanced Sensor and Control Systems
- Advanced Computational Techniques and Applications
- Railway Systems and Energy Efficiency
- Electric Vehicles and Infrastructure
- Optimal Power Flow Distribution
- Geoscience and Mining Technology
North China Electric Power University
2015-2024
China Electric Power Research Institute
2017-2024
Tsinghua University
2019-2024
Xi'an Jiaotong University
2021-2024
Tangshan College
2023
Beijing Institute of Technology
2023
Kunming University of Science and Technology
2023
Shaanxi Normal University
2023
Aalto University
2023
Xidian University
2023
Solar and wind resources are vital for the sustainable energy transition. Although renewable potentials have been widely assessed in existing literature, few studies examined statistical characteristics of inherent uncertainties arising from natural randomness, which is inevitable stochastic-aware research applications. Here we develop a rule-of-thumb learning model solar power prediction generate year-long dataset hourly errors 30 provinces China. We reveal diversified spatiotemporal...
Doubly fed induction generator (DFIG) wind turbines with virtual inertia control are coupled to power system in dynamic characteristics, and the input of is directly affected by tracking ability phase-locked loop (PLL). Thus, it urgent study impact DFIG on small-signal stability considering effects PLL. First, based operation characteristic strategy, a model interconnected integration PLL inertial established. Second, attenuation time constants state variables calculated, according speeds...
A novel wide area backup protection algorithm to identify fault branch based on the steady state component is proposed. Under normal conditions of power system, subsets buses called correlation regions (PCRs) are formed basis network topology and phasor measurement unit (PMU) placement. After occurs, by analyzing differential current in each PCR, region confirmed then a factor (FCF), calculated real time locate branch. The simulation results for 10-generator 39-bus system verify that this...
As essential pillars of passenger mobility and freight transport, road rail transportation have experienced a rapid increase over the past years. This trend indicates an in energy consumption, especially electricity, due to higher efficiency less carbon emission, but it exacerbates contradiction between power supply demand. Nowadays, for additional sources, increased solar generation has been widely installed their own available spaces transportation, which attracted great deal attention....
A coplanar waveguide (CPW)-fed dual-band antenna operating at linear and circular polarization is presented in this letter. novel composite right/left-handed (CRLH) unit cell designed as a radiation element that can provide zeroth-mode resonance positive-mode the lower upper frequency. TM <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">01</sub> mode orthogonal to +1st-Order excited by square complementary split-ring resonator (S-CSRR) order form...
An image compression and encryption scheme based on compressive sensing (CS) Fourier transform is proposed to achieve with reconstruction robustness high security. Making use of the property CS, are combined. In order avoid security limitations revealing energy information plaintext from ciphertext reusing measurement matrix improve security, chaos system two-dimensional fractional (2D-FRT) used perform encryption. Moreover, double random phase 2D-FRT can loss in diffusion The test results...
Abstract Magnons, bosonic quasiparticles carrying angular momentum, can flow through insulators for information transmission with minimal power dissipation. However, it remains challenging to develop a magnon-based logic due the lack of efficient electrical manipulation magnon transport. Here we show electric excitation and control multiferroic modes in spin-source/multiferroic/ferromagnet structure. We demonstrate that ferroelectric polarization electrically modulate magnon-mediated...
The application of phasor measurement unit (PMU) measurements and adaptive wide-area damping control based on federated Kalman filters are investigated. used for estimating the operating conditions using chi-square variables a confidence interval. When power system is precisely at preselected point, only corresponding controller active. not exactly combined formed. A 68-bus, 16-generator as test system. Three DC lines, three ESDs, remote PMU frequencies added inputs example control....
Concerning the maloperation or operation-rejection problem caused by fault resistance, a novel line protection scheme for single-phase-to-ground based on voltage phase comparison is proposed. First, according to relationship between negative-sequence current at relaying point and point, angular difference measured calculated. Subsequently, with as reference, angles of compensatory are Finally, criterion formed in in-zone out-of-zone faults. Simulation tests real time digital simulator verify...
Concerning the subsynchronous oscillation caused by integration of doubly-fed induction generator (DFIG) to power grid via series compensation circuit, a method assess stability based on dissipation intensity is proposed in this article. First, transient energy that DFIG generates one period defined as dynamic DFIG, and model containing internal control external networks constructed. And then, according Lyapunov theory, negative gradient intensity, which reflects effect generated during...
This paper develops a flexible power regulation and limitation strategy of voltage source inverters (VSIs) under unbalanced grid faults. When the classical theory is used faults, oscillations current distortions are inevitable. In proposed strategy, extended introduced to compute feedbacks together with theory. Based on combination theory, can achieve sinusoidal provision between three common targets, i.e., constant active power, balanced current, reactive power. Meanwhile, associated...
A novel algorithm for discrimination between inrush currents and internal fault by utilizing the normalized grille curve is proposed. First, calculation method of presented. Then, two schemes to discriminate from faults in time frequency domains are, respectively, developed. total 268 experimental measurements have been tested on an YNd11-connected transformer. The results indicate that proposed technique able reliably accurately distinguish with easy implementation. Furthermore, new not...
This paper presents a one-terminal fault-location method for interline and grounded faults of double-circuit transmission lines considering the distributed parameter. The influence mutual inductances is taken into account in six-sequence network parameter model. And compensation voltage with help co-rotating zero-sequence coefficient reverse defined. Then, phase amplitude fault are calculated by utilizing relationship between measured sequence current current. function constructed voltage,...
A method to analyze the angle stability of power system with multiple operating conditions considering cascading failure is proposed in this paper. First, stochastic events such as uncertain operation protection/breaker and hardware failure, condition set determined based on flow transfer theory matrix probability between different calculated. On basis, discrete Markov model established. And then, construct Lyapunov functional containing model, derive robust criterion which satisfies...
Concerning the difficulty in unified modeling of direct-drive wind farm with virtual inertia and unknown cause low frequency oscillation, a detailed model integrated dissipation energy is built. First, generator containing PLL derived On this basis, according to different sources energy, it decomposed into free resonant forced energy. These three components respectively characterize contribution inherent damping, generator-grid coupled resonance interaction stability system. And then, how...
The value setting of the traditional distance protection has become very difficult for distribution system with distributed generators (DGs) owing to randomness DG output power. This paper proposes a new adaptive scheme solve this problem. Firstly, on basis connected point DGs, protected feeders are divided into different zones, configured at upstream side DG. Then, based fault characteristic analysis DG, is studied results show that can automatically calculate settings according operation...